ZA859697B - Process and device for the removal of solid or liquid particles in suspension from a gas stream by means of an electric field - Google Patents

Process and device for the removal of solid or liquid particles in suspension from a gas stream by means of an electric field

Info

Publication number
ZA859697B
ZA859697B ZA859697A ZA859697A ZA859697B ZA 859697 B ZA859697 B ZA 859697B ZA 859697 A ZA859697 A ZA 859697A ZA 859697 A ZA859697 A ZA 859697A ZA 859697 B ZA859697 B ZA 859697B
Authority
ZA
South Africa
Prior art keywords
gas stream
electric field
particles
particle
suspension
Prior art date
Application number
ZA859697A
Inventor
Baldur Eliasson
Marcel Escudier
Michael Hirth
Jakob Keller
Original Assignee
Bbc Brown Boveri & Cie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Publication of ZA859697B publication Critical patent/ZA859697B/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
    • B03C3/0175—Amassing particles by electric fields, e.g. agglomeration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/01—Pretreatment of the gases prior to electrostatic precipitation
    • B03C3/011—Prefiltering; Flow controlling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/019—Post-treatment of gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/06—Plant or installations having external electricity supply dry type characterised by presence of stationary tube electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/12—Plant or installations having external electricity supply dry type characterised by separation of ionising and collecting stations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/36—Controlling flow of gases or vapour
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/38—Particle charging or ionising stations, e.g. using electric discharge, radioactive radiation or flames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/41—Ionising-electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/45—Collecting-electrodes
    • B03C3/47—Collecting-electrodes flat, e.g. plates, discs, gratings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/45—Collecting-electrodes
    • B03C3/49—Collecting-electrodes tubular

Landscapes

  • Electrostatic Separation (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Treating Waste Gases (AREA)
  • Gas Separation By Absorption (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

A method and device for removing solid or liquid particles contained in suspension in a gas stream by an electric field, wherein the gas stream flow is directed past ion sources which simultaneously act as field electrodes. The suspended particles are thereby changed in a bipolar manner, such that approximately half of the particles are positively charged and the other half negatively charged, and are forced by the electric field to migrate across the gas stream into a preferred neutralization zone where they are concentrated, discharged, partially agglomerated and coagulated. Subsequently, the particle-enriched and particle-depleted partial gas stream thus formed are separated and treated further in accordance with operating requirements. Thereby the remaining gas stream maximally loaded with particles is fed into a particle-removal device where their withdrawal occurs. The device results in a considerable reduction in the gas volume carried along up to the fine-cleaning stage, and a decrease in cost of the electrofilter by a factor of two or more.
ZA859697A 1984-12-21 1985-12-19 Process and device for the removal of solid or liquid particles in suspension from a gas stream by means of an electric field ZA859697B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH613084 1984-12-21

Publications (1)

Publication Number Publication Date
ZA859697B true ZA859697B (en) 1986-08-27

Family

ID=4304756

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA859697A ZA859697B (en) 1984-12-21 1985-12-19 Process and device for the removal of solid or liquid particles in suspension from a gas stream by means of an electric field

Country Status (12)

Country Link
US (1) US4734105A (en)
EP (1) EP0185966B1 (en)
JP (1) JPH0712447B2 (en)
CN (1) CN85109674B (en)
AT (1) ATE40302T1 (en)
AU (1) AU5142385A (en)
CA (1) CA1273584A (en)
DD (1) DD242568A5 (en)
DE (1) DE3567814D1 (en)
DK (1) DK599985A (en)
ES (1) ES8703746A1 (en)
ZA (1) ZA859697B (en)

Families Citing this family (51)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5439513A (en) * 1992-05-29 1995-08-08 Research Triangle Institute Device for focussing particles suspended in a gas stream
EP0713419A4 (en) * 1993-08-12 1997-05-02 Contamco Corp Improved electrostatic filter
US6004375A (en) * 1994-01-13 1999-12-21 Gutsch; Andreas Process and apparatus to treat gasborne particles
DE4400827C1 (en) * 1994-01-13 1995-04-20 Andreas Dipl Ing Gutsch Process and device for the electrically induced agglomeration of gas-borne particles
US5667563A (en) * 1995-07-13 1997-09-16 Silva, Jr.; John C. Air ionization system
US5733360A (en) * 1996-04-05 1998-03-31 Environmental Elements Corp. Corona discharge reactor and method of chemically activating constituents thereby
US5827407A (en) * 1996-08-19 1998-10-27 Raytheon Company Indoor air pollutant destruction apparatus and method using corona discharge
US6126722A (en) * 1998-07-28 2000-10-03 The United States Of America As Represented By The Secretary Of Agriculture Electrostatic reduction system for reducing airborne dust and microorganisms
US6482253B1 (en) * 1999-09-29 2002-11-19 John P. Dunn Powder charging apparatus
GB0009826D0 (en) * 2000-04-25 2000-06-07 Kukla Peter M Improvements in and relating to particulates in exhaust streams
CA2317830C (en) * 2000-09-08 2009-10-20 Her Majesty The Queen In Right Of Canada As Represented By The Minister Of The Environment Particle concentrator
FR2818451B1 (en) * 2000-12-18 2007-04-20 Jean Marie Billiotte ELECTROSTATIC ION EMISSION DEVICE FOR DEPOSITING A QUASI HOMOGENEOUS AMOUNT OF IONS ON THE SURFACE OF A MULTITUDE OF AEROSOL PARTICLES WITHIN A MOVING FLUID.
US6589314B1 (en) 2001-12-06 2003-07-08 Midwest Research Institute Method and apparatus for agglomeration
US6758884B2 (en) * 2002-08-07 2004-07-06 3M Innovative Properties Company Air filtration system using point ionization sources
WO2004041412A1 (en) * 2002-09-24 2004-05-21 Erma Eero Device for cleaning of gases from dust particles with or without ionisation and with dry, wet or both dry and wet dust catching
US7141098B2 (en) * 2004-01-22 2006-11-28 3M Innovative Properties Company Air filtration system using point ionization sources
KR100606721B1 (en) * 2004-07-06 2006-08-01 엘지전자 주식회사 Device for air-purifying in air conditioner
TWI283192B (en) * 2004-12-21 2007-07-01 Ind Tech Res Inst A flat-plate type static dust-connecting device
US7175695B1 (en) * 2005-07-28 2007-02-13 Hess Don H Apparatus and method for enhancing filtration
US7404847B2 (en) * 2005-07-28 2008-07-29 Hess Don H Apparatus and method for enhancing filtration
WO2007085114A1 (en) * 2006-01-24 2007-08-02 Shanghai Air Clean Systems Engineering Co., Ltd. An improved air purifier
GB0616916D0 (en) * 2006-08-26 2006-10-04 Secr Defence An electrostatic precipitator
JP4873564B2 (en) * 2007-03-29 2012-02-08 トヨタ自動車株式会社 Exhaust gas purification device
CN101282627B (en) * 2007-04-06 2011-04-27 联想(北京)有限公司 Wind-guiding water-blocking joint with electric field
PT103727A (en) * 2007-04-30 2008-10-30 Romualdo Luis Ribera Salcedo ELECTROSTATIC RECIRCULATION PROCESS FOR DISPOSAL AND GAS LAVAGE AND THEIR DEVICE
US8246720B2 (en) * 2007-07-31 2012-08-21 Cfd Research Corporation Electrostatic aerosol concentrator
JP4983566B2 (en) * 2007-11-26 2012-07-25 パナソニック株式会社 Clean air production equipment
MX2010006810A (en) * 2007-12-17 2010-11-30 Univ Delft Tech Use of an electric field for the removal of droplets in a gaseous fluid.
US8091167B2 (en) * 2008-01-30 2012-01-10 Dell Products L.P. Systems and methods for contactless automatic dust removal from a glass surface
KR101450551B1 (en) * 2008-02-21 2014-10-15 엘지전자 주식회사 A deodorization device of a cooking apparatus and a cooking apparatus including the deodorization device
US8167984B1 (en) 2008-03-28 2012-05-01 Rogers Jr Gilman H Multistage electrically charged agglomeration system
FR2943561B1 (en) * 2009-03-27 2011-05-20 Apr2 METHOD FOR ELECTROSTATIC SEPARATION OF A MIXTURE OF PELLETS OF DIFFERENT MATERIALS AND DEVICE FOR IMPLEMENTING THE SAME
US8038775B2 (en) 2009-04-24 2011-10-18 Peter Gefter Separating contaminants from gas ions in corona discharge ionizing bars
CN102483460B (en) 2009-04-24 2015-05-06 离子系统有限公司 Clean corona gas ionization for static charge neutralization
CA2673053A1 (en) * 2009-07-17 2011-01-17 Kourosh Zanganeh Hot sieving electrostatic precipitator
NL2003259C2 (en) * 2009-07-22 2011-01-25 Univ Delft Tech Method for the removal of a gaseous fluid and arrangement therefore.
US8416552B2 (en) 2009-10-23 2013-04-09 Illinois Tool Works Inc. Self-balancing ionized gas streams
US8143591B2 (en) 2009-10-26 2012-03-27 Peter Gefter Covering wide areas with ionized gas streams
US9028588B2 (en) 2010-09-15 2015-05-12 Donald H. Hess Particle guide collector system and associated method
NL2008818C2 (en) * 2011-10-06 2013-10-03 Konink Bam Groep Nv Particle catch arrangement for catching particles from a polluted particle flow.
US9468935B2 (en) 2012-08-31 2016-10-18 Donald H. Hess System for filtering airborne particles
JP6172714B2 (en) * 2013-05-09 2017-08-02 臼井国際産業株式会社 Exhaust gas treatment equipment for marine diesel engines using heavy oil
JP2015114230A (en) * 2013-12-12 2015-06-22 東京エレクトロン株式会社 Particle convergence method, particle convergence mechanism, particle concentration mechanism, and particle measuring apparatus including them
KR102584302B1 (en) * 2015-09-28 2023-10-04 메사추세츠 인스티튜트 오브 테크놀로지 Systems and methods for collecting species
US10399091B2 (en) 2016-01-08 2019-09-03 Korea Institute Of Machinery & Materials Electrostatic precipitation device for removing particles in explosive gases
DE102018201053A1 (en) * 2018-01-24 2019-07-25 BSH Hausgeräte GmbH Filter unit for air cleaning device
CN109225635A (en) * 2018-08-30 2019-01-18 东北师范大学 Electrostatic precipitator based on the convergence of microparticle seed snowball formula
CN109894277B (en) * 2019-03-08 2024-06-25 珠海格力电器股份有限公司 Electrostatic oil net assembly, fan and range hood
CN110018090B (en) * 2019-05-17 2020-10-27 中国科学院化学研究所 Particulate matter chemical component measuring system and method
US11772103B2 (en) * 2020-03-27 2023-10-03 Praan Inc. Filter-less intelligent air purification device
AT18030U1 (en) * 2021-08-02 2023-11-15 Villinger Markus Cleaning device for cleaning a gas

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758666A (en) * 1952-04-10 1956-08-14 Phillips Petroleum Co Carbon black separation
US2700429A (en) * 1952-10-15 1955-01-25 Research Corp Electrical precipitator
US2853151A (en) * 1955-12-06 1958-09-23 Research Corp Electrified centrifugal dust separating device
BE562091A (en) * 1956-10-31
GB846522A (en) * 1957-07-29 1960-08-31 Guenter Hermann Jucho Improvements in or relating to electrostatic precipitation
US3470417A (en) * 1966-10-03 1969-09-30 Eastman Kodak Co Method of altering electrostatic charge on an insulating material
US3496701A (en) * 1967-12-13 1970-02-24 T G Owe Berg Method and apparatus for removing particulates from flowing gases
US3777214A (en) * 1968-12-30 1973-12-04 Continental Can Co Method and apparatus for electrostatically charging particles for printing or coating
US3717977A (en) * 1971-04-05 1973-02-27 Freeman W Smoke pollutant concentrator
US3826063A (en) * 1973-05-21 1974-07-30 T Festner Electrostatic agglomeration apparatus
FR2270700B1 (en) * 1974-05-09 1980-01-11 Breton Jacques
SU567499A1 (en) * 1975-12-22 1977-08-05 Центральный научно-исследовательский и проектно-конструкторский институт профилактики пневмокониозов и техники безопасности Electrostatic aerosol coagulator
SU962653A1 (en) * 1981-03-11 1982-09-30 Алма-Атинский Энергетический Институт Apparatus for electric coagulation of aerosols
DE3314168C2 (en) * 1983-04-19 1986-07-24 Robert Bosch Gmbh, 7000 Stuttgart Method and device for cleaning gases from electrically conductive particles

Also Published As

Publication number Publication date
CN85109674B (en) 1988-11-30
EP0185966A1 (en) 1986-07-02
US4734105A (en) 1988-03-29
DK599985A (en) 1986-06-22
ES8703746A1 (en) 1987-03-01
JPH0712447B2 (en) 1995-02-15
CN85109674A (en) 1986-08-27
CA1273584A (en) 1990-09-04
DE3567814D1 (en) 1989-03-02
DD242568A5 (en) 1987-02-04
JPS61153156A (en) 1986-07-11
EP0185966B1 (en) 1989-01-25
DK599985D0 (en) 1985-12-20
AU5142385A (en) 1986-06-26
ATE40302T1 (en) 1989-02-15
ES550215A0 (en) 1987-03-01

Similar Documents

Publication Publication Date Title
ZA859697B (en) Process and device for the removal of solid or liquid particles in suspension from a gas stream by means of an electric field
ATE207779T1 (en) METHOD AND DEVICE FOR ELECTRICALLY CHARGING AND SEPARATING DIFFICULT TO SEPARATE PARTICLES FROM A GAS FLUID
ATE51162T1 (en) PROCESS FOR THE ELECTROSTATIC CHARGING OF SOLID OR LIQUID PARTICLES SUSPENDED IN A GAS STREAM USING IONS.
GB1527103A (en) Method for separating dispersed matter from a fluid mediu
UA27086C2 (en) Methof for decontamination of radioactive materials
FR2382941B1 (en)
ATE193981T1 (en) WALKING FIELD SEPARATOR FOR SEPARATING PARTICLES
FR2608453B1 (en) METHOD OF CONTINUOUS SEPARATION BY ELECTROPHORESIS AND ELECTRO-OSMOSIS OF ELECTRICALLY CHARGED POWDERED SOLID MATERIALS
ES8606392A1 (en) Fractionation of blood plasma
US1522143A (en) Method of conditioning electrodes
SE9301713D0 (en) PROCESS GAS TREATMENT
SU1016643A1 (en) Loose material drying method
SU1407554A1 (en) Method of preparing fluorite-dolomite ores for electrostatic separation
SU1304889A1 (en) Method of electrostatic separation of phosphate ores
RU2106202C1 (en) Method for final benefication of gravity baddeleyite concentrate
ES8205571A1 (en) Method and apparatus for separating suspensions of solid particles in a liquid, particularly for treating fibrous suspensions in the paper-making industry.
SU1297911A1 (en) Method of preparing fluorite-dolomite ores for electric separation
RU1814923C (en) Process for coal flotation
SU967571A1 (en) Potassium ore processing method
RU2011417C1 (en) Method of enrichment of compounded iron ores
SU1072909A1 (en) Method of preparing pyrite-containing coals for magnetic separation
JPS63143955A (en) Gas separation method
WO1982004202A1 (en) Oil treating apparatus
JPS57171456A (en) Apparatus for classifying powder
GB670260A (en) A method of separating, by combined filtering and centrifugal separation, a liquid from substances suspended in it